package com.lzl.aop;

import org.aspectj.lang.ProceedingJoinPoint;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TimeSpanAspect {
    private static final Logger log = LoggerFactory.getLogger(TimeSpanAspect.class);

    public Object around(ProceedingJoinPoint jp)throws Throwable{
        log.info("【环绕增强-前置】记录{}方法执行的开始时间。",
                jp.getSignature().getName());
        long startTime = System.currentTimeMillis();
        try{
            Object result = jp.proceed();
            log.info("【环绕增强-后置】{}方法执行结果为{}。",
                    jp.getSignature().getName(),result);
            return result;
        }catch (Throwable e){
            log.info("【环绕增强-异常抛出】{}方法执行异常信息为{}",
                    jp.getSignature().getName(),e.getMessage());
            //注意：不能隐瞒异常，需要抛出
            throw e;
        }finally {
            long endTime = System.currentTimeMillis();
            log.info("【环绕增强-最终】记录{}方法执行的结束时间，并计算耗时为{}ms.",
                    jp.getSignature().getName(),(endTime-startTime));
        }
    }
}
